Research On Speed Regulation And Control Of Controlable Differential Variable Transmission

Mechanical type step-less transmission is commonly by friction to deliverthe power, so that it limits its speed range and carrying capacity. For this twoproblems, we put forward mechanical step-less transmission to close the geardifferential turnover two inputs, form so-called "Controlled differentialcontinuously variable transmission". This can through the turnover of geardifferential synthesis function， realizing expand mechanical type step-lesstransmission range of speed regulation, and even realize the zero speed；orthrough the parallel system power diversion function，improve the bearingcapacity of the device，and realize the precise speed. In the above two problems，no matter which solve，can expand mechanical type step-less transmissionapplications.Control the type differential step-less transmission on the structure is morecomplex, device type penalty basis, the transmission ratio and speed rangeformula, etc were given by simple kinematics analysis; This device in the spacestructure exists a closure, this leads may to the generation of power cycle, simpleanalysis whether there are power flow of device method and power flowcalculation; Transmission efficiency of the final device is analyzed to derive arelationship between transmission power and device parameters. Beforecontrolled differential continuously variable transmission speed control by thefuel level to mechanical regulation, such already laborious and inaccurate， withthe advent of modern industry, especially the development of modern controltechnology. This was put forward a controlled type differential step-lesstransmission control system by using modern control system theory. Thecontrolled type differential step-less transmission in the structure was analyzed,and the expression of the adjustment speed function was deduced by theprinciple of theory. Due to the speed control function expression is too complex, and wide V belt in the process of speed may skid or belt stretching, now controltheory is difficult to realize precise speed regulation control. Using ofmathematical methods was adopted in the experiment data fitting of least squaremethod, and then control functions polynomial is formed, for the next step to laya foundation of based control theory.After the establishment of the control system in adjusting function model,this paper puts forward three kinds of overall control solution, in contrast to thechoices based the servo control system of GuGao motion controller for the plan.Hardware model is built in determine control scheme of the control system,using the front know specific parameters the encoder, GuGao motion controller,servo driver and servo motor, etc are chosen by hardware comparativeperformance parameters, finally choose the specific model type, the compositionof the hardware system structure is determined.In the hardware system is determined, we use Visual C++powerful developingsoftware functions, according to the controlled type differential step-lesstransmission is often used in the application of the actual condition, the authorputs forward three kinds of speed regulation control mode, compiles for theman-machine dialog box. A brief introduction of operational procedures ofoperation methods and step, based on GuGao motion controller develop threecontrol pattern corresponding to the program. This article for controled typedifferential step-less transmission speed regulation control of provided relativelycomplete theoretical analysis process, the realization of automatic speed controlhas a guiding significance.